package cn.itcast.netty.c1;

import io.netty.bootstrap.Bootstrap;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.nio.NioSocketChannel;
import io.netty.handler.codec.string.StringEncoder;

import java.net.InetSocketAddress;

public class HelloClient {

    public static void main(String[] args) throws InterruptedException {
        //1 启动类
        new Bootstrap()
                //2 添加EventLoop
                .group(new NioEventLoopGroup())
                //3 选择一个SocketChannel的实现
                .channel(NioSocketChannel.class)
                //4 添加处理器 handler
                .handler(new ChannelInitializer<NioSocketChannel>() {
                    @Override //在连接建立后被调用
                    protected void initChannel(NioSocketChannel ch) {
                        ch.pipeline().addLast(new StringEncoder());// String -> byteBuf
                    }
                })
                //5 连接到服务器
                .connect(new InetSocketAddress("localhost", 8080))
                .sync() //阻塞方法，直到连接建立
                .channel()// 代表连接对象
                //6 发送数据，调用具体的handler
                .writeAndFlush("hello world");
    }
}
